Bulbophyllum eutoreton J.J.Verm., Nordic J. Bot. 26 (2008) 189, fig. 32
Type: Leiden cult. 20030734 (holo L), from PNG, Central Prov.
Roots sprouting near the base of the rhizome, growing backwards along it until reaching the substrate. Rhizome up to 40 cm long, c. 3 mm in diameter, sections between pseudobulbs 0.4-0.6 cm long, erect to patent, bracts not persistent. Pseudobulbs 2.2-3 by c. 0.3 cm, porrect, distant, cylindrical, the new shoot arising 3-5 mm from the top of the pseudobulb. Leaves: petiole 0.2-0.3 cm long; blade elliptic, 5.2-5.7 by 1.3-1.5 cm, index (length/width) 3.4-4.1, subacute. Inflorescence c. 2 cm long, 1-flowered; peduncle c. 0.7 cm long, porrect; non-floriferous bracts 2, the longest c. 5 mm long; floral bract c. 3.2 mm long, tubular, acute. Flowers moderately opening. Pedicel-with-ovary c. 7 mm long, basal node on a c. 2.4 mm long stump. Dorsal sepal c. 9 by 4 mm, index 2.2-2.3, including a cuspidate tip, recurved, ovate, margins finely papillose, base rather broadly attached, rather thin, surface glabrous. Lateral sepals c. 11 by 4 mm, index 2.7-2.8, free, upper margin glabrous, lower with scattered, very fine papillae, base rather narrowly attached, otherwise as the dorsal sepal. Petals c. 2.3 by 1.5 mm, index c. 1.5, porrect, ovate-triangular, obtuse, margins finely papillose, base narrowly attached, rather thin, surface about glabrous. Lip c. 4 by 2 mm, index c. 2, only slightly recurved, elliptic, obtuse, margins slightly finely papillose proximally, otherwise glabrous, rather thick, surface glabrous; adaxially somewhat concave proximally, with two distally slightly converging ridges close to the mid-nerve at over two fifths of the length of the lip and with a flat, elliptic median callus in between; abaxially convex proximally, slightly convex distally. Column c. 1.2 mm long; stigma more or less orbicular, without keels inside, with a very slight median thickening well below its proximal margin; foot somewhat widened and with reflexed, rounded lateral teeth just above the ligament; stelidia very short and abruptly bent upwards at their base, acute, with a porrect, deltoid, more or less acute edge along the lower margin, at the level of the rostellum; rostellum protruding; anther-cap abaxially with a distinct, flat crest, surface colliculate, front margin drawn out into a deltoid beak; pollinia 2, obovoid, somewhat flattened; no appendages. (After Vermeulen, 2008)
Colours: Sepals and petals creamy-yellow, lip light yellow, base with a narrowly triangular maroon spot, column and anther-cap creamy-yellow.
Flowering time in the wild: December.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua New Guinea; Papua New Guinea; see map 96-2277M.jpg.